Trolley.



PATENTED MAR. 14, 1905.

M. 0. DAY.

TROLLEY.

APPLIUATION FILED DEC. 20. 1904.

Q91 P1165963: 0J1: vazzlot UNITED STATES Patented March 14, 1905.

MICHAEL 0. DAY, OF NEIVOASTLE, PENNSYLVANIA.

TROLLEY.

SPECIFICATION forming part of Letters Patent No. 784,843, dated March 14, 1905.

Application filed December 20, 1904:. Serial No. 237,638-

To It whom it may concern:

Be it known that 1, MICHAEL 0. DAY, a citizen of the United States of America, residing at Newcastle, in the county-of Lawrence and State of Pennsylvania, have invented certain new and useful Improvements in Trolleys, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in trolleys, and has for its object the provision of novel means preventing a trolley-wheel from becoming displaced from a trolley-wire.

Another object of this invention is to construct a novel form of swivel which may be used in conjunction with the ordinary type of trolley-pole, harp, and trolley-wheel.

The device as constructed by me is extremely simple in construction, strong and durable, and comparatively inexpensive to manufacture.

Briefly described, my improvement consists of rotatably mounting the harp in an enlarged annular shell carried by the end of a trolleypole. The harp is rotatably mounted within this shell, and I employ springs to return the harp to its normal position when the harp is out of alinement with the wire.

The above construction will be hereinafter more fully described and then specifically pointed. out in the claims, and, referring to the drawings accompanying this application, like numerals of reference designate corresponding parts throughout the several views, in which Figure 1 is a vertical sectional view, partly in side elevation, of my improved trolley device. Fig. 2 is a vertical sectional view, partly in perspective, of the same. Fig. 3 is a top plan view of a washer or partition constructed in accordance with my invention. Fig. 4 is a detail vertical sectional View of a portion of my improved device.

It is a well-known fact that when cars are passing around a curve there is a tendency of the trolley-wheels to become displaced from the trolley-wire on account of the trolleywires sometimes not traveling in the same are as the tracks and on account of insufiicient means being provided upon the car to permit the trolley-harp to turn as the car passes around the curve.

The device which I have constructed to eliminate the trouble now experienced with trolley-harps and devices of this character comprises an annular shell or casing 1, which is secured by a pin, screw, or rivet 2 to the upper end 3 of a trolley-pole. ln-this hollow shell or casing I mount a plurality of partitions 1, 5, and 6. These partitions are secured within the shell by suitable screws or pins 7.

The reference-numeral 8 designates a trolley wheel of the ordinary type which is mounted in a harp 9, and 1 provide the harp 9 with a depending stub shaft or rod 10,which is adapted to extend through the partitions at, 5, and 6 within the shell or casing 1.

Secured by a screw or pin 11 to the shaft or rod 10 is a washer 12, which is insulated from the rod or shaft 10 by theinsulation 11 and 15. A similar washer 16 is'secured, directly above the partitions 6, upon the rod 10 by a screw or pin 17. The washer 16 prevents any downward movement of the rod 10, and the washer 12 prevents any upward movement of the same.

The central partition 5 is provided with diametrically-disposed apertures 18 18, and through these apertures pass springs 19 and 20.. The spring 20 has its one end secured to the rod 10, as indicated at 21, and the upper end of the spring passes through one of the apertures 18 and has its upper end secured upon the opposite side of the rod 10 from that on which the lower end is secured. The spring 19 has its upper end secured to the rod, as indicated at 22, while the other end is secured upon the opposite side of the rod. This construction is clearly illustrated in Figs. 1 and 2 of the drawings.

The harp 9 carries a depending arm 23, to which a suitable cord or rod may be attached for lowering the trolley-wheel and trolleypole, as is now commonly the practice.

It will be observed from the foregoing description, taken in connection with the drawings, that should the wheel be turned out of alinement with the wire over which it is traveling the springs 19 and 20 will return the same to its normal position, the spring 19 serving to rotate the shaft 10 in one direction, while the spring 20 serves to rotate it in the opposite direction.

While 1 have herein shown the preferred manner of constructing my improved trolley device, it is obvious that a plurality of springs may be employed and that the same may be disposed Within the casing in any desired manner that Will accomplish the desired purpose as set forth above, and I do not care to limit myself to the specific shape and size of my improved trolley device, but may make such changes as may be permissible by the scope of the appended claims.

l Vhat 1 claim, and desire to secure by Letters Patent, is-

1. The combination with a trolley-pole, a harp and a trolley-Wheel, of a casing carried by said trolley-pole, a depending stub-shaft carried by said harp and adapted to extend with- Washers carried by said stub-shaft, insulation interposed between said stub-shaft and said washers, and means to return said shaft to its normal position should the shaft be rotated, substantially as described.

In testimony whereof I aflix my signature in the presence of two Witnesses.

MICHAEL 0. DAY. Witnesses:

J. CLYDE GILFILLAN, GEORGE T. \VEINGARTNER. 

